Classifications

• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
  • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
  • C08K5/0075—Antistatics
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/04—Oxygen-containing compounds
  • C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
  • C08K5/098—Metal salts of carboxylic acids
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
  • C08K5/41—Compounds containing sulfur bound to oxygen
  • C08K5/42—Sulfonic acids; Derivatives thereof
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
  • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
  • C08L23/04—Homopolymers or copolymers of ethene
  • C08L23/06—Polyethene
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L71/00—Compositions of polyethers obtained by reactions forming an ether link in the main chain; Compositions of derivatives of such polymers
  • C08L71/02—Polyalkylene oxides
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K3/00—Use of inorganic substances as compounding ingredients
  • C08K3/16—Halogen-containing compounds
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K3/00—Use of inorganic substances as compounding ingredients
  • C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K3/00—Use of inorganic substances as compounding ingredients
  • C08K3/32—Phosphorus-containing compounds
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L2207/00—Properties characterising the ingredient of the composition
  • C08L2207/06—Properties of polyethylene
  • C08L2207/062—HDPE

Definitions

• the invention relates to antistatic polymer compositions comprising a polymer substrate, a polyalkyleneethoxylate with a specific molecular weight and a salt. Further aspects are a process for preparing an antistatic polymer and the use of such a polyalkyleneethoxylate as antistatic agent in polymers, preferably together with a salt.
• Polymers are subject to a strong electrostatic charge which when applied, can be discharged only slowly due to low electrical conductivity. Rapid discharging is desirable for example for reasons of safety and aesthetics. Adverse effects of static charge build-up include the soiling of polymer surfaces, electrical shocks to persons touching polymers, disruption of production caused by the adhesion of film webs, destruction of electronic components, lump formation in polymer powders, and sparking followed by ignition, which may result in serious explosions.
• One aspect of the invention is a composition comprising
• Q 1 is C 20 -C 100 alkyl, preferably C 25 -C 60 alkyl.
• Q 2 is a group of formula (IIa)
• the molecular weight of the compounds of formula (I) is preferably greater 500.
• the molecular weight of the compounds of formula (I) is from 400 to 2000, preferably from 500 to 1600.
• the compounds of formula (I) are known and in the majority commercially available, for example, from Baker Petrolite Inc. under the tradename UnithoxTM Ethoxylate.
• the inorganic or organic salt is selected from the group consisting of LiClO 4 , LiCF 3 SO 3 , NaClO 4 , LiBF 4 , NaBF 4 , KBF 4 , NaCF 3 SO 3 , KClO 4 , KPF 6 , KCF 3 SO 3 , KC 4 F 9 SO 3 , Ca(ClO 4 ) 2 , Ca(PF 6 ) 2 , Mg(ClO 4 ) 2 , Mg(CF 3 SO 3 ) 2 , Zn(ClO 4 ) 2 , Zn(PF 6 ) 2 , Ca(CF 3 SO 3 ) 2 , the Na or K salt of phosphoric acid, of a C 1 -C 18 carboxylic acid, of an aromatic or aliphatic sulfonic acid.
• inorganic salts there are preferred NaClO 4 , Zn(ClO 4 ) 2 and NaBF 4 .
• organic salts there are preferred the Na + or K 30 salts of CH 3 -SO 3 ⁇ , CF 3 SO 3 ⁇ or
• thermoplastic or elastomeric polymers examples include polyethylene terephthalate (PET), polypropylene (PP), polymethyl methacrylate (PS), polystyrene (PS), polystyrene (PS), polystyrene (PS), polystyrene (PS), polystyrene (PS), polystyrene (PS), polystyrene (PS), polystyrene (PS), polystyrenethacrylate, polystyrenethacrylate, polystyrenethacrylate (PS), polystyrenethacrylate (PS), polystyrenethacrylate (PS), polystyrenethacrylate (PS), polystyrenethacrylate (PS), polystyrenethacrylate (PS), polystyrenethacrylate (PS), polystyrenethacrylonitrile-styrene (PS), polystyrene (PS), polystyrene (PS),
• Polyolefins that is to say polymers of mono-olefins, as mentioned by way of example in the preceding paragraph, especially polyethylene and polypropylene, can be prepared by various processes, especially by the following methods:
• the thermoplastic or elastomeric polymeric substrate is a polyolefin, a polystyrene, a copolymer of acrylonitrile/butadiene/styrene (ABS), a polymer of ⁇ , ⁇ -unsaturated acids, a halogen-containing polymer, a homo- or co-polymer of cyclic ethers, a polymer of unsaturated alcohols and amines, a polyacetal, a polyphenylene oxide, a polyurethane, a polyamide, a polyester, a polyurea, a polycarbonate, a polysulfone or natural rubber.
• ABS acrylonitrile/butadiene/styrene
• thermoplastic or elastomeric polymeric substrate is especially a polyolefin, a polystyrene, an acrylonitrile/butadiene/styrene (ABS) copolymer, a polymer of ⁇ , ⁇ -unsaturated acids, a halogen-containing polymer or a homo- or co-polymer of cyclic ethers.
• ABS acrylonitrile/butadiene/styrene
• thermoplastic or elastomeric polymeric substrate is more especially polyvinyl chloride (PVC), polystyrene, polyethylene in its various modifications, or polypropylene.
• PVC polyvinyl chloride
• polystyrene polystyrene
• polyethylene in its various modifications
• polypropylene polypropylene
• the antistatic polymer of formula (I) is present in an amount of from 0.1% to 30% by weight, based on the weight of the thermoplastic or elastomeric polymeric substrate.
• the inorganic or organic salt is is present in an amount of from 0.1% to 10% by weight, based on the weight of the thermoplastic or elastomeric polymeric substrate.
• the weight ratio of the antistatic polymer of formula (I) to the inorganic or organic salt is from 200:1 to 20:1.
• the composition comprises additionally an additive selected from the group consisting of a UV absorber, a sterically hindered amine, a phenolic antioxidant, a phosphite or phosphonite and a benzofuranone or indolinone.
• an additive selected from the group consisting of a UV absorber, a sterically hindered amine, a phenolic antioxidant, a phosphite or phosphonite and a benzofuranone or indolinone.
• thermoplastic or elastomeric polymeric substrate are usually added in an amount of from 0.1 to 5% by weight, based on the weight of the thermoplastic or elastomeric polymeric substrate.
• a further aspect of the invention is a process for preparing an antistatic thermoplastic or elastomeric polymeric article comprising incorporating a composition as described above into a thermoplastic or elastomeric polymeric substrate.
• the preparation may be carried out in a manner known per se by mixing the said components and, if desired, further additives with the polymer using devices known per se, such as calenders, mixers, kneaders, extruders and the like.
• the additives may be added individually or in admixture with one another. It is also possible to use so-called master batches.
• An antistatic thermoplastic polymer according to the present invention can be made into the desired form in known manner. Such processes include, for example, grinding, calendering, extruding, injection-moulding, sintering, compression/sintering or spinning, also extrusion blow-moulding, or processing according to the plastisol method.
• the antistatic thermoplastic polymer may also be processed to form foamed materials.
• an organic or inorganic salt is used additionally.
• the instant invention may be advantageously used for anti-dust application in packaging.
• the objective is to achieve a minimized dust attraction, prolonged visual appeal for rigid packaging personal care (Hair Care, Bath & shower, Skin Care, Deo) and home care (detergent, household cleaning) or rigid packaging for dairy food (milk, butter, margarine, yoghurt and the like).
• Suitable substrate polymers for these applications are: HDPE, PP, PS.
• Typical processing steps are, for example: extrusion blow molding (bottles), injection (deo), sheet (thermoforming for dairy products).
• the packaging structures may be monolayer or multilayer.
• ESD* Electrostatic Discharge protected area equipment
• the objective is to protect charge sensitive devices from ESD-events (electronics), to minimize the risk of explosion or ignition of flammable goods, to enhance long-term performance and reliability.
• Typical substrate polymers are PP and PS.
• the polystyrene powder Styron 484 Natural Polystyrene and the compound of formula I are dried in a vacuum oven for eight hours at 80° C. and 40° C. respectively.
• Appropriate amounts of the compounds of formula I are added to the dried polystyrene powder to obtain formulations containing up to 20% by weight of the compounds.
• the formulations are mixed in a turbo mixer and extruded in a twin-screw extruder (MiniLab extruder from Thermo Electron Corporation) equipped with a flat die. In this way polystyrene tapes are produced with a width of 5 mm and a thickness of around 0.5 mm.
• the processing temperature is around 200° C.
• Table 1 The results are summarized in the following Table 1.
• Example 1a is a comparative example.
• Examples 1b to 1m are examples of the present invention describing formulations including the 3 components (a), (b) and (c). They show the benefit of various salts and in most cases the good processability and visual compatibility of the compounds of formula I.
• the polypropylene powder HC115MO and the compounds of formula I are dried in a vacuum oven for eight hours at 80° C. and 40° C. respectively. Appropriate amounts of compounds of the formula I are added to the dried polypropylene powder to obtain formulations containing up to 20% by weight of the compounds.
• the formulations are mixed in a turbo mixer and extruded in a twin-screw extruder (MiniLab extruder from Thermo Electron Corporation) equipped with a flat die. In this way polypropylene tapes are produced with a width of 5 mm and a thickness of around 0.5 mm.
• the processing temperature is around 220° C. The results are summarized in Table 2.
• Example 2a is a comparative example.
• Examples 2b to 2m are examples of the present invention describing formulations including the 3 components (a), (b) and (c).
• the high density polyethylene powder BL2571 and the compounds of formula I are dried in a vacuum oven for eight hours at 80° C. and 40° C. respectively. Appropriate amounts of the compounds of formula I are added to the dried polyethylene powder to obtain formulations containing up to 20% by weight of the compounds.
• the formulations are mixed in a turbo mixer and extruded in a twin-screw extruder (MiniLab extruder from Thermo Electron Corporation) equipped with a flat die. In this way polyethylene tapes are produced with a width of 5 mm and a thickness of around 0.5 mm.
• the processing temperature is around 220° C.
• Table 3 The results are summarized in Table 3.
• Example 3a is a comparative example.
• Examples 3b to 3e are examples of the present invention describing formulations including the 3 components (a), (b) and (c). The best examples are 3b and 3c.
• the polystyrene powder Styron 484 Natural Polystyrene and the compounds of formula I are dried in a vacuum oven for eight hours at 80° C. and 40° C. respectively. Appropriate amounts of the compounds of formula I are added to the dried polystyrene powder to obtain formulations containing up to 20% by weight of the compounds.
• the formulations are mixed in a turbo mixer and compounded to pellets in a twin-screw extruder (MiniLab or Polylab from Thermo Electron Corp.) and further injection molded to larger plaques of a width of 85 mm, length of 90 mm and thickness of 2 mm using an injection molding machine (Arbug 320S). The processing temperature is around 200° C.
• Table 4 The results are summarized in Table 4.
• Example 4a and 4d are comparative examples.
• Examples 4b and 4c are examples of the present invention describing formulations comprising the 3 components (a), (b) and (c).
• the polypropylene powder HC115MO and the compounds of formula I are dried in a vacuum oven for eight hours at 80° C. and 40° C. respectively. Appropriate amounts of the compounds of formula I are added to the dried polypropylene powder to obtain formulations containing up to 20% by weight of the compound.
• the formulations are mixed in a turbo mixer and compounded to pellets in a twin-screw extruder (MiniLab or Polylab from Thermo Electron Corp.) and further injection molded to plaques of a width of 30 mm, length of 40 mm and thickness of 2 mm using a micro-injection molding machine (BabyPlast from CronoPlast) or to larger plaques of a width of 85 mm, length of 90 mm and thickness of 2 mm using an injection molding machine (Arbug 320S).
• the processing temperature is around 220° C.
• Table 5a and 5b The results are summarized in Table 5a and 5b.
• Example 5a is a comparison example.
• Examples 5b, 5c, 5d are examples of the present invention describing formulations including the 3 components (a), (b) and (c).
• Example 6a is a comparison example.
• Examples 6b to 6e are examples of the present invention describing formulations including the 3 components (a), (b) and (c).
• the polypropylene powder HC115MO and the compounds of formula I are dried in a vacuum oven for eight hours at 80° C. and 40° C. respectively. Appropriate amounts of the compounds of formula I are added to the dried polypropylene powder to obtain formulations containing up to 20% by weight of the compounds.
• the formulations are mixed in a turbo mixer and compounded to pellets in a twin-screw extruder (MiniLab or Polylab from Thermo Electron Corp.) and further blow molded to bottles of 50-100 mL (using an LE25-30 extruder and LBM-125 injection molding machine both from Labtech). The processing temperature is around 220° C.
• Table 7 The results are summarized in Table 7.
• Example 7a is a comparative example.
• Examples 7b to 7g are examples of the present invention describing formulations including the 3 components (a), (b) and (c). The best examples are 7b to 7e describing the reduction of surface resistivity and good processability and visual compatibility.
• the permanency of the surface resistivity is evaluated using the following procedure.
• the sample is dipped in distilled water at defined temperature and time. It is left to dry in ambient air for 24 hours or shorter and immediately measured at 50% relative humidity of the air without conditioning and again after prolonged conditioning at 50% relative humidity of the air.
• Table 10 summarizes the durability of the surface effect.
• the samples are PP injection molded plaques of large scale obtained according to the description in example 5.
• Example 8a is without antistatic additive.
• Examples 8b to 8e are examples of the present invention.

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• 2010
  • 2010-06-11 EP EP10725138.1A patent/EP2443190B1/en active Active
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